The first run stars are indeed flat, and less stable. The flat stock stamp I referred to here is exactly like a 1st Run. For some reason my 1st Run Stars are more nose angle sensitive than the domier Destroyers.

FWIW, Echo Stars are domey like the Pros, and have been the longest and most consistent flyer for me.

For now, I carry a Pro and a first run, with Valks filling the rest of the distance slots. The Pro and the Valks get used a lot more than the First Run Star, I just carry it in case of a mild headwind. When the Pro beats in, I have no doubt that I won't be using the first run stars, I'll just be keeping them as a backup in case I lose a seasoned Pro. Right now I'm thinking I won't be running the gamut with Destroyers, the Valk seems to do just fine in tight situations, enough HSS without having that harsh LSS when you power down.